Very bad service and no feedback or information

I have app**** online for a new sim only deal. Since I have app****, I have only received the terms and conditions from Cell-C. I have today called the 5th time for someone to phone me back and resolve my query, and still nothing from Cell-C. They have even tried to deliver the sim card to my residence without me knowing, no one was there to accept as I was not informed. Now I do not know hen it would be delivered as a can not follow up as Cell-C did not give me any documents regarding the sim or the delivery. Can you phone me urgently and resolve this.